Sapphire Crystal: Known for its **stability and hardness**, sapphire crystal ranks second

Sapphire Crystal: Known for its **stability and hardness**, sapphire crystal ranks second only to diamond in terms of durability. It effectively addresses issues such as scratches, aging, and corrosion, but its main drawback is its brittleness. Commonly used in high-end watches.

Acrylic Glass: Also known as **synthetic glass** or plexiglass, acrylic is prone to scratches but boasts good toughness and is not easily shattered. Typically used in budget-friendly watches.

Mineral Glass: Mineral glass offers a decent level of scratch resistance and is superior in withstanding direct impacts compared to sapphire crystal, making it a favored choice for military watches. Utilized in mid to low-range watches.